The Sentinel Prototype is fought in mission 11, “For Our Future,” at Trask Tower in Madripoor, and it is the one boss in the game that is not a parry fight. It is about dodging, weak points and ally prompts, and bringing your parry habits to it will get you flattened.
Hit the Arms
The machine is upper-body only, and its arms are the weak point.
Every time an arm slams into the ground, attack the exposed cables inside the arm joints. That is where your real damage comes from. Hitting it anywhere else is largely wasted effort.
Its moveset is a right-arm crush, a left-arm sweep, eye lasers, missiles, and a dual-fist punch.
Dodge Late, Not Early
This is the timing quirk that catches everyone, and it is genuinely counterintuitive.
Its blows land slightly later than they look like they will. If you dodge on the visual cue, the Sentinel tracks your new position and hits you anyway. You have to wait, which feels wrong every single time until it clicks.
Lasers Are a Run, Not a Dodge
Do not try to dodge the eye lasers. Sprint out of the beam. The same applies to the phase two missile barrages, which saturate a whole section of the floor rather than targeting a point.
Our sprint guide covers the Sprint Mode options if holding R2 through a fight this long is uncomfortable.
Use the Ally Prompts
Two assists open the fight up considerably:
When both arms are tucked close to its body, an R1 prompt lets Mystique shoot the chest for an instant Stagger.
Later, an arm becomes vulnerable to a quick time prompt that severs it outright.
Both are easy to miss if you are focused on dodging, so watch for the prompt rather than waiting to notice it.
Phase Two
One arm remains. It still leads with crush attacks, but the lasers become intermittent bursts rather than a sustained beam, and it leans more heavily on missiles. It throws two punches before each crush, which is a reliable rhythm to count.
Eventually Sabretooth blocks a huge laser with a thrown Reaver APC, which creates the biggest damage window in the fight. He is an ally here, not an opponent, which our all bosses guide explains, since people often mistake this for a Sabretooth boss encounter.
Frequently Asked Questions
Can I parry the Sentinel Prototype?
No. This is a dodge-and-weak-point fight, unlike every other boss in the game.
Where is its weak point?
The exposed cables inside its arm joints, reachable when an arm slams into the ground.
Why do I keep getting hit when I dodge?
Its attacks land later than they appear to. Dodging early lets it track you. Dodge late.
How do I avoid the lasers?
Sprint out of the beam rather than dodging it. The same applies to phase two’s missile barrages.